Add initial project files

plugins/prettier/one-line-sorted-imports.cjs

@@ -0,0 +1,77 @@
+const estreePlugin = require("prettier/plugins/estree");
+
+function hasSpecifierComments(node) {
+  return (
+    node.specifiers?.some((specifier) => specifier.comments?.length > 0) ??
+    false
+  );
+}
+
+function flattenImportLines(doc) {
+  if (typeof doc === "string") {
+    return doc;
+  }
+
+  if (Array.isArray(doc)) {
+    return doc.map(flattenImportLines);
+  }
+
+  if (!doc || typeof doc !== "object") {
+    return doc;
+  }
+
+  if (doc.type === "line") {
+    return " ";
+  }
+
+  if ("contents" in doc) {
+    return {
+      ...doc,
+      contents: flattenImportLines(doc.contents),
+    };
+  }
+
+  if (doc.type === "fill" && "parts" in doc) {
+    return {
+      ...doc,
+      parts: flattenImportLines(doc.parts),
+    };
+  }
+
+  if (doc.type === "if-break") {
+    return {
+      ...doc,
+      breakContents: flattenImportLines(doc.breakContents),
+      flatContents: flattenImportLines(doc.flatContents),
+    };
+  }
+
+  if (doc.type === "group" && "expandedStates" in doc) {
+    return {
+      ...doc,
+      expandedStates: flattenImportLines(doc.expandedStates),
+    };
+  }
+
+  return doc;
+}
+
+const estreePrinter = estreePlugin.printers.estree;
+
+module.exports = {
+  printers: {
+    estree: {
+      ...estreePrinter,
+      print(path, options, print, args) {
+        const printed = estreePrinter.print(path, options, print, args);
+        const node = path.getNode();
+
+        if (node?.type === "ImportDeclaration" && !hasSpecifierComments(node)) {
+          return flattenImportLines(printed);
+        }
+
+        return printed;
+      },
+    },
+  },
+};